Polycarbonate/ABS blends

Abstract

The present invention involves blends of polycarbonate resin with rubber grafted terpolymer resin, one or more styrenic rigid coplymers wherein a small amount of an aliphatic C4 to C16 polyalpha olefin homopolymer or copolymer or its functionalized derivatives is included in the blend.

What is claimed is: 
     
       1. A thermoplastic composition comprising: (A) from 10 to 90 percent by weight of one or more polycarbonate resins;   (B) from 5 to 50 percent by weight of rubber grafted terpolymer;   (C) from 5 to 70 percent by weight of a styrenic resin; and   (D) from 0.1 to 8.0 percent by weight of an aliphatic C 4  to C 16  polyalpha olefin polymer having a number average molecular weight of from about 100 to about 5000 g/mol as determined by gel permeation chromatography.   
     
     
       2. The thermoplastic composition of claim 1, wherein the thermoplastic composition comprises from 0.25 to 2.5 percent by weight of the aliphatic C 4  to C 16  polyalpha olefin polymer. 
     
     
       3. The thermoplastic composition of claim 1, wherein said aliphatic C 4  to C 16  polyalpha olefin polymer is made by polymerizing one or more monoolefins selected from the group consisting of 1-butene, trans-2-butene, cis-2-butene, isobutylene, 2-methyl-1-propene, 1-pentene, 4-methylpentene4, 1-hexene, 1-octene and 1-nonene and mixtures thereof. 
     
     
       4. The thermoplastic composition of claim 1, wherein the aliphatic C 4  to C 16  polyalpha olefin polymer is made by polymerizing one or more C 4  to C 16  monoolefins, optionally including up to 20 weight percent ethylene as a comonomers, wherein the relative amount of ethylene is based on the combined weight of C 4  to C 16  monoolefins and ethylene. 
     
     
       5. The thermoplastic composition of claim 1 wherein the aliphatic C 4  to C 16  polyalpha olefin polymer is made by polymerizing one or more C 4  to C 16  monoolefins, optionally including up to 20 weight percent propylene as a comonomers, wherein the relative amount of propylene is based on the combined weight of C 4  to C 16  monoolefins and propylene. 
     
     
       6. The thermoplastic composition of claim 1, wherein said polycarbonate resins have a weight average molecular weight of from about 18,000 to about 57,000. 
     
     
       7. The thermoplastic composition of claim 1, further comprises at least one additional component selected from mineral fillers, fibers, stabilizers, colorants, antistatic additives and lubricants. 
     
     
       8. A thermoplastic composition comprising: (A) from 10 to 90 percent by weight of one or more polycarbonate resins;   (B) from 5 to 50 percent by weight of rubber grafted terpolymer resins;   (C) from 5 to 70 percent by weight of a styrchic resin; and   (D) from 0.1 to 8.0 percent by weight of a functionalized aliphatic C 4  to C 16  polyalpha olefin polymer having a number average molecular weight of from about 100 to about 5000 g/mol, as determined by gel permeation chromatography.   
     
     
       9. The thermoplastic composition of claim 8, wherein the thermoplastic composition comprises from 0.25 to 2.5 percent by weight of the functionalized aliphatic C 4  to C 16  polyalpha olefin polymer. 
     
     
       10. The thermoplastic composition of claim 8, wherein said functionalized aliphatic C 4  to C 16  polyalpha olefin polymer is made by polymerizing one or more monoolefins selected from the group consisting of 1-butene, trans-2-butene, cis-2-butene, isobutylene, 2-methyl-1-propene, 1-pentene, 4-methylpentene-1, 1hexene, 1-octene and 1-nonene and mixtures thereof. 
     
     
       11. The thermoplastic composition of claim 8, wherein the functionalized aliphatic C 4  to C 16  polyalpha olefin polymer is made by polymerizing one or more C 4  to C 16  monoolefins, optionally including up to 20 weight percent ethylene as a comonomer, wherein the relative mount of ethylene is based on the combined weight of C 4  to C 16  monoolefins and ethylene. 
     
     
       12. The thermoplastic composition of claim 8, wherein the functionalized aliphatic C 4  to C 16  polyalpha olefin polymer is made by polymerizing one or more C 4  to C 16  monoolefins, optionally including up to 20 weight percent propylene as a comonomers, wherein the relative amount of propylene is based on the combined weight of C 4  to C 16  monoolefins and propylene. 
     
     
       13. The thermoplastic composition of claim 8, wherein said polycarbonate resins have a weight average molecular weight of from about 18,000 to about 55,000. 
     
     
       14. The thermoplastic composition of claim 8, wherein said aliphatic C 4  and C 16  polyalpha olefin is epoxy-functionalized. 
     
     
       15. The thermoplastic composition of claim 1, wherein the an aliphatic C 4  to C 16  polyalpha olefin polymer is a copolymer of isobutylene and butene. 
     
     
       16. The thermoplastic composition of claim 1, wherein the an aliphatic C 4  to C 16  polyalpha olefin polymer is an epoxidized polybutene or a copolymer of epoxidized 1-butene, 2-butene and 2-methyl-1-propene.